THERMO-Time Switch

The thermo-time switch controls the time the cold start valve is switched on. This time limit is usually between 5-20 seconds depending upon engine. The time switch has a bimetal contact, surrounded by a heating coil. The heating coil receives current during cranking. The bimetal contact breaks the ground circuit of the cold start valve whenever the heating coil is about 95°F (35°C) or when the delay time is up. Delay time is shortened as temperature raises.